What is measured?
The measurement identifies whether a specific phase is present in the sample. Confirmation of a structural hypothesis is done by confronting the expected Bragg peaks (in terms of Q positions and intensities) to the X-ray scattering data. It also provides a quick access to the corresponding unit cell parameters.
Typical phases are: lamellar, hexagonal, cubic…
Figure 1. Identification of a hexagonal 2D supperlattice.
Reference: García‐Iglesias, M. , de Waal, B. F., de Feijter, I. , Palmans, A. R. and Meijer, E. W. (2015), Nanopatterned Superlattices in Self‐Assembled C2‐Symmetric Oligodimethylsiloxane‐Based Benzene‐1,3,5‐Tricarboxamides. Chem. Eur. J., 21: 377-385. doi: 10.1002/chem.201404375)
Typical samples for this measurement are:
Block copolymer systems in all forms
Advantages of SAXS
Why use SAXS for phase identification?
SAXS measurements are suitable for in situ and/or operando conditions
SAXS allows to follow direct phase transformation
It accurately reveals the evolution of phases as a function of external parameters such as temperature, reaction time or shear.
All these measurements are possible directly in your lab.
Smart nanoscale characterization
The Next Generation
(GI-)SAXS/WAXS/USAXS beamline for the laboratory